Pipe cutter



Feb. 25,".1930.

R. A. LINCOLN PIPE CUTTER Filed May 51, 1928 v IN VEN TOR. Habe/7^ A. L /nc 0//7 BY ATTORNEY `.Pe't'eafecip Feb. 25,y 1930 UMTD;STATES PATENT ori-*1ct .v ROBERT A. LINCLN, or WICHITA FALLs, TEXAS, yiissIciNon or oNE-'IIALF'TO AMERI- e CAN IRON a MACHINE Wonxs, INC., CF oKLAHoivIA CITY, yoiinarioiviii, A CORPORA- rIoN orl OKLAHOMA, i

PIPE CUTTER Application inea May 31, i928. "serial no. 282,012.

i My invention relates to pipe cutters, and

' resiliently urge the cutting member into functioning engagement Withthe pipe, and to adjustthe tension of resilient urging means. .f In accomplishing these and other objects of the invention l have provided improved details of structure, the preferred forms of Which are illustrated inthe accompanying w drawings, wherein:

Fig. 1 is a perspective'vievv of the device mounted on apipe, the pipe and a supportv ing member being shown fragmentarily.

f Fig. 2 is averticalcential sectional view,

A illustrating the relation of the device to a pipe and pipe coupling, ,and showing the edges of the cutting members in engagement With the periphery of the pipe.

Y view illustrating kthe Fig. 3 is a similar vertical central sectional y position of parts after the pipefhas been cut.

Fig. t is an enlarged detail perspectivek view of the rcutter-supporting portion of the Vbody of the device, and showing a cutter cage, cutter, Vand pivot pin separated from the body.

Y Fig. is a cross section on the line 5 5,

Fig. f 2. v

Referring in detail to the drawings: 1 designates acutter support comprising i' preferably a tubular body 2 having a slot 3 wherein ak cutter 4 is movable into `cutting' engagement with a pipe 5 on which the body is mounted for cutting the pipe. The device is illustrated as Aapplied to a section of tub ing yasinjan oil'Well, and thebody 2 is of suit-y .I able diameter for lfree.` movement over' the tubing yand for passing pipecouplings, sucli as 6,'sothat the device may be passed over Aa plurality of pipe sections for'positioning is to be cut. j

in cutting relation' with the ypipe section that A tubular member 7 is screw-tbreadedly engaged with the upper enlarged 'end 8 of the body forv advancing 4the body towards cutting position and for' rotating the body to effect the cutting operation, the member 7 supporting the body and extending upwardly to ac tuating means (not shown) at the top of the well. f

The lower end 9'of the body is reduced 'and externally screw-threaded to support a guide member 10 having a flaring mouth ll'for facilitating the advancing movement of the de-.K vice over the couplingsof a string of pipe sections,v and through lu'id'in the well.

A plurality of similar cuttersll maybe provided, and one Will be particularly described. rlhe cutterll is pivotally supported on apin 12 extending across the slot 3 transversely of fthe body 2, and has an arcuate cutting arm 13 provided with a cutting edge 14 Which is'beveled to produce a cutting point 15, adapted to movev circumferentially over the pipe upon rotationof the body. Extending from the cutter oppositely to the arm 13 is a heel or Vlever arm 16, which projects radially beyond the periphery of the body, and a'sleevel slidable on the body is 'urged against the heel 16 by a spring 18 to'pivot the cutter e and hold the point 15 in Contact with the pipe.y

ScreW-threadedly engaged With a threaded portion .19 of the body adjacent'the reduced end 9 is a retaining and adjusting nut 2O r,against which the spring bears, the nut being yrotatable to increase or reduce thetensionof the spring, and'thereby'vary the relation/of the cutter to the pipe.r A' Washer 2l may be interposed between the spring and the sleeve.`

"1' I' preferably support the cutter l from the body by,v a cage or socket member 22 fitting vin the slot 3, and having end flanges 23 seatable iny recesses 24 adjacent the slot, the cage bei/ngl secured to the body of the device by rivets 25 Hextending inv suitable openings of the bodyand flanges, and having heads countersunk in the respective members. The cut-` ter is mounted in the cage andthe cage fixed in the slot, for assembling the device. n

A cutting device constructed as described, maybe provided of suitable diameter for operating on the pipe to be cut, and the adjusting nut moved yto provide the suitable tension i 'on the spring Jfor pivoting the cutters into eective cutting relation withthe pipe andv for assuming the penetration of the pipe by the cutters. j

The 'device is advanced over the pipe, for

example, being lowered over a string of pipe sections joined by couplings, bythe tubular supporting member, the guide member guiding the body'member over the couplings, and' the cutters being pivotally retracted .against the influence of the spring. When thecutters i f' have been-advanced to cutting location, the

tubular supporting'member is rotated by suitable means, and the cutters cut a circumferential groove in the pipe, the groove'deepening upon each successive rotation of the device until the parts of the pipe are separated.

What I claim and desire to secureby Letters yPatent is: t* l l. A tool of the'character described, including a tubular body having a slot, a cutting member movably mounted in said slot having a cutting point and a heel projected inwardly and outwardly ofsaid body respec-V tively, an actuator on Vsaid body engaging saidV heel,.and means yieldingly urging theactuator against said heel 4to project the cutting point to cutting position. Y

2., A tool of the character described, includingv a tubular bodyuhaving a slot, Va cutting member movably mounted in said slot a heel at its other end projectedinto the 'space between said protuberances, a sleeve slidable on said body beneath the slot, a springsurrounding said rbody engagingVv the lower of said'k protuberances at one end and said heel t, its opposite end to rock the cutting mem- Y el.

In testimony whereof I aii my signature.

ROBERT A, LrNcoLN havinga cutting point anda heel projected inwardly and loutwardly of said bodyl respectively, a sleeve slidabley on said body, and

^ means yieldingly urging the sleeve against v wardly of said body.l

cally pivoted in said slot vhaving a cutting point at oneend projected inwardly of said. body and a heel atits other end projected A into the space between said protuberances, a

i iis sleeve slidable ony said body, and a spring surj j rounding the body and engaging said sleeve at one end andone of said -protuberances at its opposite end to rock the cutting member to cutting position. "5. A tool of thevcharacter described, including a tubular body having spaced annu-l lar protuberances and a slot between the protuberances, a cutting member eccentrically pivoted in said slot having a cuttingpoint at one end projected inwardly of said body and 

